Two-phase separation temperature testing device

Abstract

This utility model relates to the field of lubricating oil performance testing technology, specifically a two-phase separation temperature testing device, including a sapphire autoclave. A testing component is mounted on the top of the sapphire autoclave, and a protective component is mounted on one side of the autoclave. The testing component includes a sealed top cover, and a first sample inlet tube is fixedly connected inside the sealed top cover. This two-phase separation temperature testing device, by installing the testing component, allows the first and second sample inlet tubes to be inlet pipes for refrigerant and refrigeration oil at room temperature. A "constant pressure injection vessel" achieves high-temperature, constant-pressure refrigerant injection, thereby changing the refrigerant / refrigeration oil ratio in the system. This allows for continuous testing without cooling, saving testing time.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil performance testing technology, specifically a two-phase separation temperature testing device. Background Technology

[0002] Lubricating oil has functions such as lubrication, cooling, flushing, and sealing, and is an indispensable and important component of refrigeration compressors. However, when lubricating oil carried out with the compressor exhaust mixes into the refrigeration system, it will have a significant impact on performance. Under the current background of energy conservation and emission reduction, the compatibility of refrigerants with their matching refrigeration lubricating oils is receiving increasing attention. Therefore, it is necessary to use a two-phase separation temperature testing device.

[0003] In existing technologies, the compatibility testing of refrigeration oil in China involves pouring refrigeration oil into a transparent glass test tube, adding refrigerant, and heating it at room temperature or in a water bath to make the test oil and refrigerant a homogeneous and transparent solution. Then, the test tube is cooled in a cold bath. When a white precipitate appears at the bottom of the test tube, indicating that the solution has separated into two phases or is slightly turbid, the temperature at which the solution separated into two phases or became turbid is measured from the cooling bath. The compatibility is then recorded based on the changes at each moment.

[0004] However, the pressure inside the glass test tube containing the sample solution must not exceed 0.4 MPa when filled with refrigerant, and the pressure inside the glass test tube should not exceed 1.0 MPa during the test. Excessive pressure can easily cause a violent explosion, posing a significant safety hazard and increasing the risk of accidents. Furthermore, after refrigerant is added, the glass test tube needs to be removed from the cooling bath, secured with a test tube clamp, the valve and pressure-resistant hose disconnected, the outside of the glass test tube wiped dry with alcohol, and then weighed in a protective cylinder to ensure the measured refrigerant weight is close to the specified amount, with an error margin of ±0.10 g. This process is cumbersome and prone to errors. Therefore, how to conduct chemical compatibility tests on refrigeration oils, improve safety and testing efficiency, is a problem urgently needing to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a two-phase separation temperature testing device to solve the problem mentioned in the background art of how to conduct chemical compatibility tests on refrigeration oil and improve the safety and testing efficiency during the testing process. To achieve the above objective, this invention provides the following technical solution: a two-phase separation temperature testing device, comprising a sapphire autoclave, a testing component mounted on the top of the sapphire autoclave, a protective component mounted on one side of the sapphire autoclave, the testing component comprising a sealed top cover, a first sample inlet tube fixedly connected to the inside of the sealed top cover, a second sample inlet tube fixedly connected to the inside of the sealed top cover, a first pressure gauge fixedly connected to the inside of the sealed top cover, a thermometer fixedly connected to the inside of the sealed top cover, and a through-tube disposed inside the sealed top cover;

[0006] The conduit includes a first branch, which is fixedly connected to the inside of the sealed top cover. A first interface valve is installed inside the first branch. A constant pressure injection vessel is installed inside the first branch. A second branch is fixedly connected to the other end of the first branch. A second interface valve is installed inside the second branch. A third branch is fixedly connected to the side surface of the second branch. The third branch is fixedly connected to the inside of the sealed top cover. A third interface valve is installed inside the third branch. A second pressure gauge is installed inside the constant pressure injection vessel. A magnetic stirrer is installed at the bottom of the sapphire autoclave.

[0007] Further preferably, the test assembly also includes a closing plate, which is fixedly connected to one side of the closed top cover. By installing the test assembly, the first and second sample inlet pipes can be used as sample inlet pipes for refrigerant and refrigeration oil at room temperature. High-temperature, constant-pressure refrigerant injection is achieved through a "constant-pressure injection vessel," thereby changing the refrigerant / refrigeration oil ratio in the system. The process involves first closing the first and third interface valves, opening the second interface valve, evacuating, charging with room-temperature / low-temperature medium-pressure liquid refrigerant, closing the second interface valve, and then opening the first and third interface valves. The system uses a constant-pressure injection valve to close the first and third interface valves. Data is then read, and the refrigerant addition amount is calculated. The refrigerant addition amount equals the injection mass of the "refrigerant storage bottle" and the residual refrigerant mass in the "constant-pressure injection vessel + pipe." The injection mass is determined by the mass difference before and after injection into the "refrigerant storage bottle." The volume of the "constant-pressure injection vessel + pipe" is pre-determined, and the air pressure is measured using a second pressure gauge. The residual refrigerant mass in the "constant-pressure injection vessel + pipe" can be calculated. High-temperature, constant-pressure refrigerant injection is achieved through the "constant-pressure injection vessel," thereby changing the refrigerant / refrigeration oil ratio in the system. This allows for continuous testing without cooling, saving testing time.

[0008] More preferably, the protective component includes a supporting base plate disposed below the sapphire autoclave. A protective frame is fixedly connected to the top of the supporting base plate, and a frame groove is formed inside the protective frame. The protective component also includes a connecting hinge, which is fixedly connected to one side of the protective frame. A frame door is fixedly connected to the other end of the connecting hinge, and an opening and closing handle is provided inside the frame door. By installing the protective component, the supporting base plate can support the entire sapphire autoclave, and the outer protective frame can protect the internal components from collisions. Furthermore, the user can use the opening and closing handle to control the opening and closing of the frame door within the frame groove, thereby improving the protective performance of the device.

[0009] More preferably, a support column is fixedly connected to the bottom of the supporting base plate, and an anti-slip foot is fixedly connected to the bottom of the support column. An observation glass is fixedly connected inside the frame door. A lock cylinder is provided inside the opening and closing handle. A weighing device is provided on one side of the sapphire autoclave. An operation panel is fixedly connected to one side of the weighing device. A wiring hole is opened on the top of the thermometer, and a mounting flange is fixedly connected to the side surface of the thermometer.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] In this invention, by installing the testing components, the first and second injection tubes can be used as injection lines for refrigerant and refrigeration oil at room temperature. A "constant pressure injection vessel" is used to achieve high-temperature, constant-pressure refrigerant injection, thereby changing the refrigerant / refrigeration oil ratio within the system. The process involves first closing the first and third interface valves, opening the second interface valve, evacuating the system, charging with room-temperature / low-temperature medium-pressure liquid refrigerant, closing the second interface valve, then opening the first and third interface valves for constant-pressure injection, and finally closing the first interface valve. The third interface valve is then used to read the data and calculate the amount of refrigerant added. The amount of refrigerant added is equal to the mass of the sample injected into the "refrigerant storage bottle" and the mass of the residual refrigerant in the "constant pressure injection vessel + pipe". The mass of the sample injected is determined by the mass difference before and after the injection into the "refrigerant storage bottle". The volume of the "constant pressure injection vessel + pipe" is determined in advance. The air pressure of the "constant pressure injection vessel + pipe" is measured by the second pressure gauge. The mass of the residual refrigerant in the "constant pressure injection vessel + pipe" can be obtained. The "constant pressure injection vessel" is used to achieve high temperature and constant pressure injection of refrigerant, thereby changing the ratio of refrigerant / refrigeration oil in the system, thus achieving the purpose of continuous testing without cooling and saving testing time.

[0012] In this invention, by installing protective components, the sapphire autoclave can be supported by the base plate, and the outer protective frame can protect the internal components from collisions. Furthermore, the user can use the opening and closing handle to control the opening and closing of the frame door within the frame groove, thereby improving the protective performance of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the unfolded three-dimensional structure of the present invention. Figure 1 ;

[0015] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0016] Figure 4 This is a schematic diagram of the unfolded three-dimensional structure of the present invention. Figure 2 ;

[0017] Figure 5 This utility model Figure 4 Enlarged structural diagram at point B;

[0018] Figure 6 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0019] In the diagram: 1. Sapphire autoclave; 2. Test assembly; 201. Sealed top cover; 202. First injection tube; 203. Second injection tube; 204. First pressure gauge; 205. Thermometer; 206. Through pipe; 2061. First branch; 2062. First interface valve; 2063. Constant pressure injection vessel; 2064. Second branch; 2065. Second interface valve; 2066. Third branch; 2067. Third interface valve; 2068. Second pressure gauge; 207. Magnetic stirrer; 208. Closing plate; 3. Protective assembly; 301. Support base plate; 302. Protective frame; 303. Frame groove; 304. Connecting hinge; 305. Frame door; 306. Opening and closing handle; 4. Support column; 5. Anti-slip feet; 6. Observation glass; 7. Lock cylinder; 8. Weighing device; 9. Operation panel; 10. Wiring hole; 11. Mounting flange. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-6 This utility model provides a technical solution: a two-phase separation temperature testing device, including a sapphire autoclave 1, a testing component 2 is provided on the top of the sapphire autoclave 1, a protective component 3 is provided on one side of the sapphire autoclave 1, the testing component 2 includes a closed top cover 201, a first sample inlet tube 202 is fixedly connected inside the closed top cover 201, a second sample inlet tube 203 is fixedly connected inside the closed top cover 201, a first pressure gauge 204 is fixedly connected inside the closed top cover 201, a thermometer 205 is fixedly connected inside the closed top cover 201, and a through tube 206 is provided inside the closed top cover 201;

[0022] The through-tube 206 includes a first branch 2061, which is fixedly connected to the inside of the closed top cover 201. A first interface valve 2062 is installed inside the first branch 2061. A constant pressure injection vessel 2063 is installed inside the first branch 2061. The other end of the first branch 2061 is fixedly connected to a second branch 2064. A second interface valve 2065 is installed inside the second branch 2064. A third branch 2066 is fixedly connected to the side surface of the second branch 2064. The third branch 2066 is fixedly connected to the inside of the closed top cover 201. A third interface valve 2067 is installed inside the third branch 2066. A second pressure gauge 2068 is installed inside the constant pressure injection vessel 2063. A magnetic stirrer 207 is installed at the bottom of the sapphire high-pressure vessel 1.

[0023] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, the test assembly 2 also includes a closing plate 208, which is fixedly connected to one side of the closed top cover 201. By installing the test assembly 2, the first injection pipe 202 and the second injection pipe 203 can be used as injection pipes for refrigerant and refrigeration oil at room temperature. The "constant pressure injection vessel 2063" is used to achieve high-temperature constant-pressure injection of refrigerant, thereby changing the refrigerant / refrigeration oil ratio in the system. First, the first interface valve 2062 and the third interface valve 2067 are closed, the second interface valve 2065 is opened, the system is evacuated, and then charged with room temperature / low temperature medium-pressure liquid refrigerant. The second interface valve 2065 is then closed, and then the first interface valve 2065 is opened. 062, third interface valve 2067, constant pressure injection, close first interface valve 2062, third interface valve 2067, then read the data and calculate the refrigerant addition amount. The refrigerant addition amount = the injection mass of the "refrigerant storage bottle" and the residual refrigerant mass in the "constant pressure injection vessel 2063 + through pipe 206". The injection mass is determined by the mass difference before and after injection of the "refrigerant storage bottle". The volume of the "constant pressure injection vessel 2063 + through pipe 206" is determined in advance. The air pressure of the "constant pressure injection vessel 2063 + through pipe 206" is measured by the second pressure gauge 2068. The residual refrigerant mass in the "constant pressure injection vessel 2063 + through pipe 206" can be obtained. High temperature constant pressure injection of refrigerant is achieved through the "constant pressure injection vessel 2063", thereby changing the refrigerant / refrigeration oil ratio in the system.

[0024] In this embodiment, as Figure 2 , Figure 4 and Figure 6 As shown, the protective component 3 includes a supporting base plate 301, which is located below the sapphire autoclave 1. A protective frame 302 is fixedly connected to the top of the supporting base plate 301. A frame groove 303 is provided inside the protective frame 302. The protective component 3 also includes a connecting hinge 304, which is fixedly connected to one side of the protective frame 302. A frame door 305 is fixedly connected to the other end of the connecting hinge 304. An opening and closing handle 306 is provided inside the frame door 305. By installing the protective component 3, the supporting base plate 301 can support the sapphire autoclave 1 as a whole. The outer protective frame 302 can protect the internal components from collisions. The user can use the opening and closing handle 306 to control the opening and closing of the frame door 305 in the frame groove 303.

[0025] In this embodiment, as Figure 4 , Figure 5 and Figure 6As shown, a support column 4 is fixedly connected to the bottom of the supporting base plate 301, and an anti-slip foot 5 is fixedly connected to the bottom of the support column 4. An observation glass 6 is fixedly connected inside the frame door 305. A lock cylinder 7 is installed inside the opening and closing handle 306. A weighing device 8 is installed on one side of the sapphire autoclave 1. An operation panel 9 is fixedly connected to one side of the weighing device 8. A wiring hole 10 is opened on the top of the thermometer 205. A mounting flange 11 is fixedly connected to the side surface of the thermometer 205.

[0026] The usage and advantages of this utility model: The working process of this two-phase separation temperature testing device is as follows:

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, by installing test component 2, the first injection tube 202 and the second injection tube 203 can be used as injection lines for refrigerant and refrigeration oil at room temperature. High-temperature, constant-pressure refrigerant injection is achieved through the "constant-pressure injection vessel 2063," thereby changing the refrigerant / refrigeration oil ratio in the system. First, the first interface valve 2062 and the third interface valve 2067 are closed, and the second interface valve 2065 is opened. The system is then evacuated and filled with room-temperature / low-temperature medium-pressure liquid refrigerant. The second interface valve 2065 is then closed. Next, the first interface valve 2062 and the third interface valve 2067 are opened for constant-pressure injection. The first interface valve 2062 and the third interface valve 2067 are then closed. Data is then read, and the refrigerant addition amount is calculated. The refrigerant addition amount = "refrigerant storage". The sample injection mass of the "bottle" is determined by measuring the mass difference before and after injection of the "refrigerant storage bottle". The volume of the "constant pressure injection vessel 2063 + pipe 206" is measured in advance. The air pressure of the "constant pressure injection vessel 2063 + pipe 206" is measured by measuring the second pressure gauge 2068. The mass of the residual refrigerant in the "constant pressure injection vessel 2063 + pipe 206" can be obtained. The "constant pressure injection vessel 2063" achieves high-temperature constant pressure injection of refrigerant, thereby changing the refrigerant / refrigeration oil ratio in the system. Then, by installing the protective component 3, the supporting base plate 301 can support the sapphire high pressure vessel 1 as a whole. Then, the outer protective frame 302 can protect the internal components to prevent them from being hit. The user can use the opening and closing handle 306 to control the opening and closing of the frame door 305 in the frame groove 303.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A two-phase separation temperature testing device, comprising a sapphire autoclave (1), characterized in that: The top of the sapphire autoclave (1) is provided with a test assembly (2), and a protective assembly (3) is provided on one side of the sapphire autoclave (1). The test assembly (2) includes a closed top cover (201). The inside of the closed top cover (201) is fixedly connected to a first injection tube (202). The inside of the closed top cover (201) is fixedly connected to a second injection tube (203). The inside of the closed top cover (201) is fixedly connected to a first pressure gauge (204). The inside of the closed top cover (201) is fixedly connected to a thermometer (205). The inside of the closed top cover (201) is provided with a through tube (206). The through pipe (206) includes a first branch (2061), which is fixedly connected to the inside of the closed top cover (201). A first interface valve (2062) is provided inside the first branch (2061). A constant pressure injection vessel (2063) is provided inside the first branch (2061). The other end of the first branch (2061) is fixedly connected to a second branch (2064). A second interface valve (2065) is provided inside the second branch (2064). A third branch (2066) is fixedly connected to the side surface of the second branch (2064). The third branch (2066) is fixedly connected to the inside of the closed top cover (201). A third interface valve (2067) is provided inside the third branch (2066). A second pressure gauge (2068) is provided inside the constant pressure injection vessel (2063). A magnetic stirrer (207) is installed at the bottom of the sapphire high-pressure vessel (1).

2. The two-phase separation temperature testing device according to claim 1, characterized in that: The test assembly (2) also includes a closing plate (208), which is fixedly connected to one side of the closed top cover (201).

3. The two-phase separation temperature testing device according to claim 1, characterized in that: The protective component (3) includes a support base plate (301), which is located below the sapphire autoclave (1). A protective frame (302) is fixedly connected to the top of the support base plate (301), and a frame groove (303) is provided inside the protective frame (302).

4. The two-phase separation temperature testing device according to claim 3, characterized in that: The protective component (3) also includes a connecting hinge (304), which is fixedly connected to one side of the protective frame (302). The other end of the connecting hinge (304) is fixedly connected to a frame door (305), and the frame door (305) is provided with an opening and closing handle (306) inside.

5. The two-phase separation temperature testing device according to claim 4, characterized in that: The bottom of the bearing base plate (301) is fixedly connected to a support column (4), and the bottom of the support column (4) is fixedly connected to an anti-slip foot (5).

6. The two-phase separation temperature testing device according to claim 4, characterized in that: An observation glass (6) is fixedly connected inside the frame door (305), and a lock cylinder (7) is provided inside the opening and closing handle (306).

7. The two-phase separation temperature testing device according to claim 1, characterized in that: A weighing device (8) is provided on one side of the sapphire autoclave (1), and an operation panel (9) is fixedly connected to one side of the weighing device (8).

8. The two-phase separation temperature testing device according to claim 1, characterized in that: The thermometer (205) has a wiring hole (10) on its top and a mounting flange (11) fixedly connected to the side surface of the thermometer (205).

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